21130030246 has 32 divisors (see below), whose sum is σ = 34344797760. Its totient is φ = 9691951104.

The previous prime is 21130030213. The next prime is 21130030247. The reversal of 21130030246 is 64203003112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130030247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7741410 + ... + 7744138.

It is an arithmetic number, because the mean of its divisors is an integer number (1073274930).

Almost surely, 2^21130030246 is an apocalyptic number.

21130030246 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21130030246 is a deficient number, since it is larger than the sum of its proper divisors (13214767514).

21130030246 is a wasteful number, since it uses less digits than its factorization.

21130030246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21130030246 its reverse (64203003112), we get a palindrome (85333033358).

The spelling of 21130030246 in words is "twenty-one billion, one hundred thirty million, thirty thousand, two hundred forty-six".